Back stretching device



FIG. 1 is a front perspective view of a back stretching device showing my new design.

FIG. 2 is a rear view thereof.

FIG. 3 is a front view thereof.

FIG. 4 is side view thereof, with the other side being a mirror image thereof.

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof. 

The ornamental design for a back stretching device, as shown and described. 